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Products Description

EN 10217 STEEL PIPE

Standard:EN 10217

Grade: P195GH, P235GH, P265GH

Outside Diameter: 20-660mm

Wall Thickness:1.3-16mm

Length: 5.8,m, 6m, 12m or as your requirement

The Wall Thickness Tolerance: ±5%

Surface Treatment: Bare Finish, Painting, Oiling, Galvanzation, 3PE, FBE coated......

Chemical Composition

Chemical composition(cast analysis)%
Steel Grade	C	Si max.	Mn	P max.	S max.
P195GH	≤0.13	0.35	≤0.70	0.025	0.020
P235GH	≤0.16	0.35	≤1.20	0.025	0.020
P265GH	≤0.20	0.40	≤1.40	0.025	0.020

Physical Requirements

Mechanical properties for wall thickness T≤16
Steel Grade	Tensile properties at room temperature
	Upper yield strength MPa	Tensile strength Mpa	Elongation %
			longitudinal	transverse
P195GH	195	320-440	27	25
P235GH	235	360-500	25	23
P265GH	265	410-570	23	21

Characteristics

The main characteristics of EN10217 steel pipe
1. Material and performance
• Made of non-alloy steel with high strength and corrosion resistance.
• Excellent compression performance, due to strict welding process control, can meet the needs of high-pressure fluid transportation.
• Smooth surface and precise dimensions, suitable for precision machining (e.g. cutting, welding, etc.).

2. Inspection and reliability
• Ensure product safety and reliability through rigorous quality inspection (e.g. impact testing, chemical composition analysis).

3. Application scenery
• Widely used in oil, gas, chemical and other industries of fluid transport, as well as building structural support.

Production And Processing

EN 10217 Steel pipe production and processing

Production process
1. Prepare raw materials
EN 10217 steel tubes are made of unalloyed steel as a base material, usually steel plates or strips, and are subject to chemical composition analysis and surface quality inspection to ensure compliance with standard requirements.

2. Molding process
• Straight seam welded pipe (LSAW) : The steel plate is bent into a tube by forming process such as UOE, JCOE or RBE, and then welded by double-sided submerged arc welding (SAW). The UOE process is suitable for high volume production, and the JCOE process is more flexible, especially for high steel grade thick wall pipes.
• Spiral welded pipe (SSAW) : The strip steel coil is helically formed after leveling and pre-bending treatment, and welded by submerged arc welding process, which is suitable for large diameter pipe.
• Resistance welded pipe (ERW) : The use of high frequency current to heat the edge of the tube billet and squeeze welding, suitable for small and medium-sized diameter pipe, high production efficiency.

3. Welding and post-processing
• Weld quality inspection (such as ultrasonic flaw detection and X-ray detection) is required after welding.
• Some steel pipes need to be expanded to eliminate residual stress, or to improve mechanical properties through heat treatment such as normalizing (N) and tempering (T).

4. Surface treatment and inspection
• Surface polishing, sandblasting or anti-rust treatment to improve corrosion resistance.
• Strict chemical composition analysis, mechanical property testing and non-destructive testing

Processing Points

1. Cutting and forming
Plasma cutting, laser cutting or mechanical cutting can be used to ensure smooth incision. Shaped tubes such as square tubes need to be shaped by the mold, such as round tubes and square tubes need to be formed several times under pressure.

2. Welding and connection
• Argon arc welding or submerged arc welding is recommended to avoid the risk of intergranular corrosion that may result from high-frequency welding.
• Clean the surface of the oil before welding, and polish the weld bead and anti-corrosion treatment after welding.

3. Cold drawing and straightening
The cold drawing process is used to adjust the wall thickness and diameter, which needs to be combined with lubricants to reduce friction; The straightener is used to correct the straightness of the pipe and ensure the installation accuracy.

Storage and Use

Storage requirements
1. Environmental control
• Store in a dry, ventilated, rainproof and sunproof warehouse, away from fire sources and corrosive media.
• The pipe must be isolated from the ground with a support (recommended height ≥20cm) to avoid moisture.

2. Code arrangement
• Upright: suitable for short pipe, need to use a fixed frame to prevent toppling.
• Lying flat: The long pipe should be placed in layers, and the layers should be padded with non-slip materials (such as rubber pads) to avoid extrusion deformation.

3. Perform regular maintenance
• Check whether the anti-rust coating on the surface is intact. If necessary, apply anti-rust oil or place moisture-proof agent.
• Clean surface dust every quarter to avoid oxidative rust.

EN10217 STEEL PIPES

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